/* Renkler yalnız buradaki değişkenlerden. Açık tema varsayılan; sistem koyuysa ya da seçilmişse koyu. */
:root {
  --bg: #f3f2ef; --surface: #fff; --surface-2: #f7f6f3;
  --ink: #17232e; --ink-2: #3c4a57; --muted: #66727e; --line: #e4e2dd; --line-strong: #cfd4d9;
  --brand: #253746; --on-brand: #fff; --brand-soft: #e6ecf1; --accent: #5c7f9d;
  --nav: #253746; --nav-ink: rgba(255,255,255,.72); --nav-on: #fff; --nav-hover: rgba(255,255,255,.08);
  --red: #a33a2b; --red-soft: #f7e7e4; --green: #2f6b4f; --green-soft: #e3f0e9;
  --grid: rgba(23,35,46,.08); --marker: rgba(23,35,46,.3);
  --c1: #253746; --c2: #7fa1bf; --c3: #2f6b4f; --c4: #a33a2b; --c5: #a7b1bb;
  --shadow: 0 1px 2px rgba(23,35,46,.06), 0 1px 1px rgba(23,35,46,.03);
  --serif: "Libre Baskerville", Georgia, serif; --sans: Inter, system-ui, sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e151c; --surface: #16212b; --surface-2: #1b2833;
    --ink: #e9eef2; --ink-2: #c3ccd4; --muted: #8e9ba7; --line: #24323f; --line-strong: #334452;
    --brand: #9dbad3; --on-brand: #0e151c; --brand-soft: #22323f; --accent: #9dbad3;
    --nav: #111a22; --nav-ink: rgba(233,238,242,.66); --nav-on: #fff; --nav-hover: rgba(255,255,255,.06);
    --red: #e5806f; --red-soft: #3a2220; --green: #74b896; --green-soft: #1d3329;
    --grid: rgba(233,238,242,.08); --marker: rgba(233,238,242,.35);
    --c1: #9dbad3; --c2: #e9eef2; --c3: #74b896; --c4: #e5806f; --c5: #5f7283;
    --shadow: none;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0e151c; --surface: #16212b; --surface-2: #1b2833;
  --ink: #e9eef2; --ink-2: #c3ccd4; --muted: #8e9ba7; --line: #24323f; --line-strong: #334452;
  --brand: #9dbad3; --on-brand: #0e151c; --brand-soft: #22323f; --accent: #9dbad3;
  --nav: #111a22; --nav-ink: rgba(233,238,242,.66); --nav-on: #fff; --nav-hover: rgba(255,255,255,.06);
  --red: #e5806f; --red-soft: #3a2220; --green: #74b896; --green-soft: #1d3329;
  --grid: rgba(233,238,242,.08); --marker: rgba(233,238,242,.35);
  --c1: #9dbad3; --c2: #e9eef2; --c3: #74b896; --c4: #e5806f; --c5: #5f7283;
  --shadow: none;
  color-scheme: dark;
}

* { box-sizing: border-box; }
body { margin: 0; font: 14px/1.55 var(--sans); color: var(--ink-2); background: var(--bg); -webkit-font-smoothing: antialiased; }
h1, h2, h3 { color: var(--ink); margin: 0; }
h1 { font: 400 26px/1.25 var(--serif); }
h2 { font: 600 17px/1.3 var(--sans); margin: 36px 0 14px; }
h3 { font: 600 14.5px/1.35 var(--sans); }
a { color: var(--accent); }

/* Kabuk */
.layout { display: grid; grid-template-columns: 220px 1fr; min-height: 100vh; }
nav { background: var(--nav); padding: 24px 12px; position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; gap: 2px; }
nav .brand { color: var(--nav-on); letter-spacing: 5px; font-size: 15px; padding: 0 12px 24px; }
nav a { display: block; color: var(--nav-ink); text-decoration: none; padding: 9px 12px; font-size: 14px; font-weight: 500; border-radius: 8px; }
nav a:hover { background: var(--nav-hover); color: var(--nav-on); }
nav a.on { color: var(--nav-on); background: var(--nav-hover); box-shadow: inset 3px 0 0 var(--c2); }
nav .foot { margin-top: auto; display: flex; flex-direction: column; gap: 8px; padding: 0 4px; }
main { padding: 28px 36px 64px; max-width: 1320px; width: 100%; }

/* Sayfa başı */
.page-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; flex-wrap: wrap; margin-bottom: 6px; }
.lead { color: var(--muted); margin: 6px 0 20px; max-width: 820px; }
.seg { display: inline-flex; background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 3px; gap: 2px; }
.seg button { background: transparent; border: 0; color: var(--muted); padding: 6px 12px; border-radius: 7px; }
.seg button.on { background: var(--brand); color: var(--on-brand); }

/* Izgaralar */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(440px, 1fr)); gap: 16px; align-items: start; }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 16px; align-items: start; }
.grid > .card, .grid-3 > .card { margin: 0; }

/* Kart */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 18px 20px; margin-bottom: 16px; box-shadow: var(--shadow); min-width: 0; }
.card > h3 + .muted { margin-top: 4px; }
.card > p.muted { font-size: 13px; }

/* Göstergeler */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 12px; margin: 16px 0; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; box-shadow: var(--shadow); display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.stat .eyebrow { font-size: 12.5px; font-weight: 500; letter-spacing: 0; text-transform: none; color: var(--muted); }
.stat b { font: 600 28px/1.2 var(--sans); color: var(--ink); font-variant-numeric: tabular-nums; overflow-wrap: anywhere; }
.stat .muted { font-size: 12.5px; }
.eyebrow { font-size: 12px; font-weight: 500; color: var(--muted); }

/* Form */
.row { display: flex; gap: 12px; align-items: flex-end; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 140px; } .row > .fix { flex: none; min-width: 0; }
.head { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; margin-bottom: 6px; }
label { display: block; font-size: 12.5px; font-weight: 500; color: var(--muted); margin: 12px 0 5px; }
input, select, textarea { width: 100%; font: inherit; color: var(--ink); padding: 8px 11px; border: 1px solid var(--line-strong); border-radius: 8px; background: var(--surface); }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
input[type=checkbox] { width: auto; margin-right: 6px; accent-color: var(--brand); }
textarea { min-height: 64px; resize: vertical; }
button { font: 600 13px var(--sans); padding: 9px 16px; border: 1px solid var(--brand); background: var(--brand); color: var(--on-brand); border-radius: 8px; cursor: pointer; }
button:hover { filter: brightness(1.08); }
button.ghost { background: var(--surface); color: var(--ink); border-color: var(--line-strong); }
button.light { background: transparent; color: var(--nav-on); border-color: rgba(255,255,255,.28); }
button.danger { background: var(--surface); color: var(--red); border-color: var(--red); }
button.small { padding: 5px 10px; font-size: 12.5px; }
button:disabled { opacity: .45; cursor: default; filter: none; }

/* Tablo */
table { width: 100%; border-collapse: collapse; }
th { text-align: left; font: 600 12px var(--sans); color: var(--muted); padding: 8px 12px 8px 0; border-bottom: 1px solid var(--line-strong); white-space: nowrap; }
td { padding: 9px 12px 9px 0; border-bottom: 1px solid var(--line); vertical-align: top; color: var(--ink); }
tr:last-child td { border-bottom: 0; }
tbody tr:hover td, table tr:hover td { background: var(--surface-2); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
main > table, main > .gap > table { background: var(--surface); border: 1px solid var(--line); border-radius: 12px; }
main > table td:first-child, main > table th:first-child { padding-left: 16px; }

/* Etiket ve kutular */
.tag { display: inline-block; font-size: 12px; font-weight: 500; padding: 2px 8px; border-radius: 999px; background: var(--surface-2); color: var(--muted); margin-right: 4px; }
.tag.ok { background: var(--green-soft); color: var(--green); } .tag.warn { background: var(--brand-soft); color: var(--accent); } .tag.off { background: var(--red-soft); color: var(--red); }
.errors { background: var(--red-soft); color: var(--red); padding: 10px 14px; margin: 14px 0; border-radius: 8px; } .errors ul { margin: 4px 0 0; padding-left: 18px; }
td .errors { margin: 2px 0; padding: 2px 8px; display: inline-block; }
.note { background: var(--surface-2); padding: 10px 14px; margin: 12px 0; border-radius: 8px; color: var(--ink-2); }
pre.shape { background: var(--surface-2); padding: 12px 14px; margin: 8px 0; overflow-x: auto; font: 12.5px/1.5 ui-monospace, monospace; color: var(--ink); border-radius: 8px; }
summary { cursor: pointer; }
.toast { position: fixed; right: 24px; bottom: 24px; background: var(--ink); color: var(--bg); padding: 12px 18px; border-radius: 10px; box-shadow: 0 6px 24px rgba(0,0,0,.2); }
.login { max-width: 380px; margin: 12vh auto; padding: 28px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; }
.login .brand { letter-spacing: 5px; color: var(--ink); text-align: center; margin-bottom: 24px; font-size: 17px; }
.muted { color: var(--muted); } .right { text-align: right; } .gap { margin-top: 16px; }

/* Grafik */
.chart { width: 100%; height: auto; display: block; }
.chart .axis { font: 11px var(--sans); fill: var(--muted); }
.legend { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 12px 0 8px; font-size: 13px; color: var(--ink-2); }
.legend b { color: var(--ink); font-weight: 600; }
.legend i { display: inline-block; width: 10px; height: 10px; margin-right: 6px; border-radius: 3px; }
.tip { font-size: 12.5px; min-height: 20px; }
.funnel { display: grid; grid-template-columns: minmax(110px, 160px) 1fr auto; gap: 12px; align-items: center; margin-top: 10px; font-size: 13.5px; }
.funnel-track { background: var(--surface-2); height: 20px; border-radius: 6px; overflow: hidden; }
.funnel-bar { background: var(--c1); height: 100%; border-radius: 6px; }
.funnel-value { font-size: 12.5px; white-space: nowrap; }
.funnel-value b { font: 600 16px var(--sans); color: var(--ink); font-variant-numeric: tabular-nums; }

@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; }
  nav { position: static; height: auto; flex-direction: row; flex-wrap: wrap; align-items: center; padding: 12px; }
  nav .brand { padding: 0 12px 0 4px; }
  nav .foot { margin: 0 0 0 auto; flex-direction: row; }
  main { padding: 20px 16px 50px; }
  .grid-3 { grid-template-columns: 1fr; }
  .funnel { grid-template-columns: 1fr; gap: 4px; }
}